Sewer-shoe



(No-Model.) v

' C. K. SHERBURNE.

K sEwEE s EoE. No. 376,113. Patented Jan. 10, 1888.

@gw l @Howlett vof the same.

UNITED STATES PATENT OFFICE.

CHARLES/K. SHEBBURNE, OF MINNEAPOLIS, MINNESOTA.

SEWER-SHOE.

SPECIFICATION forming part ofk Letters Patent No. 376,113, dated January 10, 1888.

Application tiled August 15,1887. Serial No.24649. (No model.)

To all whom it may concern.'

Be it known that I, CHARLEs K. SHER- BURNE, a citizen of the United States, and a resident of the city of Minneapolis, vcounty of Hennepin, State of Minnesota, have invented a certain new and useful Sewer-Shoe, ofwhich the following is a specication, .reference being had to the accoinpanying drawings.

My invention relates to the wall-retaining scaffolding or frame-work used in excavating for sewers; andit has for its object to provide an improved form of shoe for retaining the rangers and braces iu position and receiving the pressure of the cross-braces.

My invention consists in the device hereinafter fully described and particularly claimed.

In the drawings, like letters referring to like parts, Figure I is a plan of theframe-work iny asewer-ditch, showing my invention in working position. Fig. 2 is a vertical crosssection Fig. 3 is a perspective of one side of the interior frame-work. Fig. 4 is a plan View of my shoe detached, and Fig. 5 is a cross-section on the line X X of Fig. 4.

Ais thesheeting, B are longitudinal girders or rangers, and C is a cross-brace of the class which are used to retain the sheeting in posishoes, and is prevented from displacementV downward by the lower flanges on-the shoes. These shoes are made of sufficient thickness to stand the pressure and of suflicient lengthto overlap the ends of the adjacent rangers, even if they should happen to be several inches apart. These shoes are a` great convenience in sewer excavation, and effect also a great saving in time and cost of material. One set of shoes is sufficientv for one gang of men, as they may be used over and over again. The flanges make them stronger, serve to hold the shoe in position, to prevent displacement of the cross-braces, and are so applied as to make theshoes reversible. Hence, if by any inequality of pressure the shoe should become bent out of shape, all that is necessary is to turn it upsidedown, reversing it, and it will be again straightened.

The impossibility of displacing the crossbrace by any downward jar or undue weight placed thereon is alsoV a very material point. Otherwise there is always a liability of caving, waste of time, and serious peril to life. It is also a convenience in deep sewer-ditches,where a second or third set of sheeting has to be put down, as it takes up comparativelylittle space and enables the inner sheeting to be kept substantially in line.

What I claim, and desire to secure by Letters Patent of the United States, is as follows:

1. A metallic sewer-shoe provided with a right -angled ilange the body of which is adapted to overlap thev ends of two adjacent rangers and receive the pressure from the cross-brace, and the ilange of which is adapted to rest-on the top of said rangers, as and for the purpose set forth.

2. rlhe metallic sewer shoe D, provided on its edges with the right-angled flanges d and d in-opposite directions, as and for the purpose set forth.

3. In combination, sheeting A, rangers B, cross-brace C, and the metallic shoe D d d, placed intermediate the ends of said brace and said rangers, substantially as described.

CHARLES K. SHERBURNE.

In presence of- J As. F.' WILLiAMsoN, EMMA F. ELMORE.v 

